[foh-lee-ey-shuh n]


Origin of foliation

First recorded in 1615–25; foliate + -ion
Related formssub·fo·li·a·tion, nounsu·per·fo·li·a·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for foliation

Historical Examples of foliation

British Dictionary definitions for foliation



  1. the process of producing leaves
  2. the state of being in leaf
  3. the arrangement of leaves in a leaf bud; vernation
  1. ornamentation consisting of foliage
  2. ornamentation consisting of cusps and foils
any decoration with foliage
the consecutive numbering of the leaves of a book
geology the arrangement of the constituents of a rock in leaflike layers, as in schists
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for foliation

1620s, from French foliation or formed in English from Latin foliatus (see foliate (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper

foliation in Science



The set of layers visible in many metamorphic rocks as a result of the flattening and stretching of mineral grains during metamorphism.
Related formsfoliated adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.